> On Fri, Apr 06, 2001 at 01:09:58PM +0200, Florian Lohoff wrote:
> There are multiple solutions to this problem:
>
> - ll/sc emulation in the kernel
> Implementing an ll/sc emulation into the fast path of the illegal
instruction
> handler and compile the glibc with ll/sc support.
>
> - repair sysmips
> Sysmips is essentially broken - My fix i have sent to the linux-mips
list
> is only a workaround but not a fix. Also there is currentl NO ISA I
support
> in the sysmips implementation. I hope to get around to build a proper
> fix this weekend in assembly.
>
> Probably we will do both - An even better solution would be to let the
glibc
> detect the ISA level or the existance of ll/sc in userspace and replace
_test_and_set
> with one or the other primitiv - Using sysmips on R3000 or ll/sc less
systems.
What advantage would there be to using sysmips() as opposed
to doing the ll/sc emulation? It seems to me that the decode path
in the kernel would be just as fast, and there would be a single
"ABI" for all programs - the ll/sc instructions themselves.
Kevin K.
